One, wrong forums, you'll get no help here if the question is aimed at any other CoD

Two, you use a prestige token to reset BO2 stats back to starting default (also re-locks everything, and I mean everything) - if you don't have one of those pretty prestige tokens, start a whole new xbox live account cause there isn't any other way...

Three, you're welcome because I actually answered your question even if it was completely in the wrong place... lol